I think I have oral thrush. Eating dinner tonight burned the entire inside of my mouth bad and I’ve got sores and inflammation. Took Benadryl and calling dr in the morning. I think it’s from having a constant dry mouth.

Found this:

Red type: This is less common and also known as erythematous candidiasis. The name comes from the Greek word “erythema,” which means red. In long-term denture-wearers, it’s normally seen as a stark red outline on the denture-bearing area. However, erythematous thrush can make the entire inside of the mouth look inflamed in patients who have chronic dry mouth, Sjogren's syndrome, or have received radiation therapy to the head or neck.